/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2019 Ha Thach (tinyusb.org)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#include "usb_descriptors.h"
#include "main.h"
#include "tusb.h"

//--------------------------------------------------------------------+
// Device Descriptors
//--------------------------------------------------------------------+
tusb_desc_device_t const desc_device = {.bLength         = sizeof(tusb_desc_device_t),
                                        .bDescriptorType = TUSB_DESC_DEVICE,
                                        .bcdUSB          = 0x0200,
                                        .bDeviceClass    = 0x00,
                                        .bDeviceSubClass = 0x00,
                                        .bDeviceProtocol = 0x00,
                                        .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,

                                        // https://github.com/raspberrypi/usb-pid
                                        .idVendor  = 0x2E8A,
                                        .idProduct = 0x107C,
                                        .bcdDevice = 0x0100,

                                        .iManufacturer = 0x01,
                                        .iProduct      = 0x02,
                                        .iSerialNumber = 0x03,

                                        .bNumConfigurations = 0x01};

// Invoked when received GET DEVICE DESCRIPTOR
// Application return pointer to descriptor
uint8_t const *tud_descriptor_device_cb(void) {
    return (uint8_t const *)&desc_device;
}

//--------------------------------------------------------------------+
// HID Report Descriptor
//--------------------------------------------------------------------+

uint8_t const desc_hid_report[] = {TUD_HID_REPORT_DESC_KEYBOARD(HID_REPORT_ID(REPORT_ID_KEYBOARD)),
                                   TUD_HID_REPORT_DESC_ABSMOUSE(HID_REPORT_ID(REPORT_ID_MOUSE))};

// Invoked when received GET HID REPORT DESCRIPTOR
// Application return pointer to descriptor
// Descriptor contents must exist long enough for transfer to complete
uint8_t const *tud_hid_descriptor_report_cb(uint8_t instance) {
    (void)instance;
    return desc_hid_report;
}

bool tud_hid_n_abs_mouse_report(uint8_t instance,
                                uint8_t report_id,
                                uint8_t buttons,
                                int16_t x,
                                int16_t y,
                                int8_t vertical,
                                int8_t horizontal) {
    mouse_abs_report_t report = {.buttons = buttons, .x = x, .y = y, .wheel = vertical, .pan = horizontal};
    return tud_hid_n_report(instance, report_id, &report, sizeof(report));
}

bool tud_hid_abs_mouse_report(
    uint8_t report_id, uint8_t buttons, int16_t x, int16_t y, int8_t vertical, int8_t horizontal) {
    return tud_hid_n_abs_mouse_report(0, report_id, buttons, x, y, vertical, horizontal);
}

//--------------------------------------------------------------------+
// Configuration Descriptor
//--------------------------------------------------------------------+

enum { ITF_NUM_HID, ITF_NUM_TOTAL };

#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_HID_DESC_LEN)

#define EPNUM_HID 0x81

uint8_t const desc_configuration[] = {
    // Config number, interface count, string index, total length, attribute, power in mA
    TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 500),

    // Interface number, string index, protocol, report descriptor len, EP In address, size &
    // polling interval
    TUD_HID_DESCRIPTOR(ITF_NUM_HID,
                       0,
                       HID_ITF_PROTOCOL_NONE,
                       sizeof(desc_hid_report),
                       EPNUM_HID,
                       CFG_TUD_HID_EP_BUFSIZE,
                       1)};

#if TUD_OPT_HIGH_SPEED
// Per USB specs: high speed capable device must report device_qualifier and
// other_speed_configuration

// other speed configuration
uint8_t desc_other_speed_config[CONFIG_TOTAL_LEN];

// device qualifier is mostly similar to device descriptor since we don't change configuration based
// on speed
tusb_desc_device_qualifier_t const desc_device_qualifier = {.bLength = sizeof(tusb_desc_device_qualifier_t),
                                                            .bDescriptorType = TUSB_DESC_DEVICE_QUALIFIER,
                                                            .bcdUSB          = USB_BCD,

                                                            .bDeviceClass    = 0x00,
                                                            .bDeviceSubClass = 0x00,
                                                            .bDeviceProtocol = 0x00,

                                                            .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
                                                            .bNumConfigurations = 0x01,
                                                            .bReserved          = 0x00};

// Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request
// Application return pointer to descriptor, whose contents must exist long enough for transfer to
// complete. device_qualifier descriptor describes information about a high-speed capable device
// that would change if the device were operating at the other speed. If not highspeed capable stall
// this request.
uint8_t const *tud_descriptor_device_qualifier_cb(void) {
    return (uint8_t const *)&desc_device_qualifier;
}

// Invoked when received GET OTHER SEED CONFIGURATION DESCRIPTOR request
// Application return pointer to descriptor, whose contents must exist long enough for transfer to
// complete Configuration descriptor in the other speed e.g if high speed then this is for full
// speed and vice versa
uint8_t const *tud_descriptor_other_speed_configuration_cb(uint8_t index) {
    (void)index; // for multiple configurations

    // other speed config is basically configuration with type = OHER_SPEED_CONFIG
    memcpy(desc_other_speed_config, desc_configuration, CONFIG_TOTAL_LEN);
    desc_other_speed_config[1] = TUSB_DESC_OTHER_SPEED_CONFIG;

    // this example use the same configuration for both high and full speed mode
    return desc_other_speed_config;
}

#endif // highspeed

// Invoked when received GET CONFIGURATION DESCRIPTOR
// Application return pointer to descriptor
// Descriptor contents must exist long enough for transfer to complete
uint8_t const *tud_descriptor_configuration_cb(uint8_t index) {
    (void)index; // for multiple configurations

    // This example use the same configuration for both high and full speed mode
    return desc_configuration;
}

//--------------------------------------------------------------------+
// String Descriptors
//--------------------------------------------------------------------+

// String Descriptor Index
enum {
    STRID_LANGID = 0,
    STRID_MANUFACTURER,
    STRID_PRODUCT,
    STRID_SERIAL,
};

// array of pointer to string descriptors
char const *string_desc_arr[] = {
    (const char[]){0x09, 0x04}, // 0: is supported language is English (0x0409)
    "Hrvoje Cavrak",            // 1: Manufacturer
    "DeskHop Switch",           // 2: Product
    "0",                        // 3: Serials, should use chip ID
};

static uint16_t _desc_str[32];

// Invoked when received GET STRING DESCRIPTOR request
// Application return pointer to descriptor, whose contents must exist long enough for transfer to
// complete
uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
    (void)langid;

    uint8_t chr_count;

    if (index == 0) {
        memcpy(&_desc_str[1], string_desc_arr[0], 2);
        chr_count = 1;
    } else {
        // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
        // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors

        if (!(index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0])))
            return NULL;

        const char *str = string_desc_arr[index];

        // Cap at max char
        chr_count = strlen(str);
        if (chr_count > 31)
            chr_count = 31;

        // Convert ASCII string into UTF-16
        for (uint8_t i = 0; i < chr_count; i++) {
            _desc_str[1 + i] = str[i];
        }
    }

    // first byte is length (including header), second byte is string type
    _desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * chr_count + 2);

    return _desc_str;
}
